Keyboard



FIG. 1 is a top, front perspective view of a keyboard showing our new design;

FIG. 2 is a top, rear perspective view from the upper back, left side thereof;

FIG. 3 is top plan view thereof;

FIG. 4 is a bottom plan thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a right side elevation view thereof.

The broken lines depict portions of a keyboard in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 